/*
 * Copyright 2021 Muii
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.gitee.muii.echarts.constant.string;

public class CoordinateSystem extends StringConstants {

    private static CoordinateSystem coordinateSystem;

    public static CoordinateSystem getInstance() {
        if (coordinateSystem == null) {
            coordinateSystem = new CoordinateSystem();
        }
        return coordinateSystem;
    }

    public CoordinateSystem() {
        this.add(CARTESIAN_2D);
        this.add(POLAR);
    }

}
